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Finding the Fourth Proportional to 716,120.61, 988,226.71 and 393,830.70

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Solution

The fourth proportional to 716,120.61, 988,226.71 and 393,830.70 is: 543,475.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,120.61 : 988,226.71 = 393,830.70 : x
  2. Step 2: Convert to fraction form
    716,120.61/988,226.71 = 393,830.70/x
  3. Step 3: Cross multiply
    716,120.61x = 988,226.71 × 393,830.70
  4. Step 4: Simplify right side
    716,120.61x = 389,194,015,973.42
  5. Step 5: Solve for x
    x = 389,194,015,973.42/716,120.61
  6. Step 6: Final answer
    x = 543,475.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.